: The system converts your Western (Gregorian) date into the Chinese Lunar Calendar and identifies your Four Pillars (Heavenly Stems and Earthly Branches).
Several free online tools can generate a chart. Most require your birth date, time, and location to calculate the exact placement of stars across the 12 Life Palaces. Free Zi Wei Dou Shu Calculators zi wei dou shu calculator free
Introduction to Zi Wei Dou Shu (紫微斗数) - Imperial Harvest : The system converts your Western (Gregorian) date
A standard calculator will output a "Ming Pan" (Life Chart) consisting of: here are some free calculator resources:
If you're interested in exploring Zi Wei Dou Shu without spending a fortune, here are some free calculator resources: